Every file has a meta-data. Meta-data of the files which is getting moved is stored on active tier and data and metadata is moved into the cloud. There is no multiple data-movement policy set on single mtree. Data moved to particular cloud unit depends on datamovement policy. And only the unique data is sent to the cloud. This is done using the deduplication.
In order to keep data protection tools from getting overwhelmed by the enormous capacity requirements generated in today’s data centers, technologies which enable data to be tiered from primary backup to secondary long term retention/archive are becoming more attractive. Dell EMC Cloud Tier technology integrates with an Dell EMC ECS Object Storage system (on premises or hosted private cloud) to provide a massively scalable architecture. By leveraging the capabilities of both of these platforms, IT administrators and architects can continue the path of consolidating critical backup processes, protecting complex environments mixed with unstructured data, database engines, virtual environments, while at the same time providing the ability to meet long term.